Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea07d10d86302b7…

MALICIOUS

PDF

79.3 KB Created: 2021-09-11 21:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: da6a50ce224cb608aab01838cd010b2d SHA-1: 8e56bbe5b808eb222582883f8b7c6d45dc8b50fa SHA-256: 9ea07d10d86302b7bb9fa55f5e170d93150ee03cc140f3ea5b990503046e0a9c
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://deepex.hu/hirek/files/5911845536.pdf In PDF document text
    • http://aloisiquadri.it/userfiles/files/gigax.pdfIn PDF document text
    • https://faguaflowers.com/images/admin/file/zejoxupojematupuripexur.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55629729314.pdfIn PDF document text
    • http://canissapiens.com/images/uploads/file/sepojataler.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/wibeta.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/30029751100.pdfIn PDF document text
    • http://fc-junajted.com/upload/datoteke/lazirulapavupipowonofa.pdfIn PDF document text
    • http://nktrading.qa/file/files/kenitikosow.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/kuwutajudejij.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/64327698792.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/7a3241da00e70dbfe091c6da6e8fce08/lavuwafuz.pdfIn PDF document text
    • https://norservis.info/files/files/60202241054.pdfIn PDF document text
    • http://coffee33.ru/archive/file/76857881489.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/puvawoxidakazulegenuwa.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/foderugavagugegek.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/zekidepubulipumekadujozij.pdfIn PDF document text
    • http://thcsducthang.pgdbactuliem.edu.vn/ckfinder/userfiles/files/tamexole.pdfIn PDF document text
    • http://thriftstorewebsites.net/flash/thriftstorewebsites.net/file/33784776475.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/11447396291.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16139dfaf49689---foxesoxifinerowuk.pdfIn PDF document text
    • http://simoncaulkin.com/images/54125002722.pdfIn PDF document text
    • http://pilot-market.ru/new/files/file/makunijijibelujedebilo.pdfIn PDF document text
    • http://alvitraders.com/files/8012774106.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1630635319.pdfIn PDF document text
    • http://travelspace.pl/userfiles/file/jivimufumaba.pdfIn PDF document text
    • https://pikhospital.com/ck_uploads/uploads/files/97601719424.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=formatar+celular+android+bloqueadoPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A9 17940 bytes
SHA-256: 60dded3a3ed46a2ab2d442b6e73946cc6ce9f8ba3e416c4d5efc9af78e29723a
font_01_sfnt_off00010042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10042 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11859 10724 bytes
SHA-256: eea254854fe13c14c947acf60805f3c490ec0d482876b1c9d6bb69520adf0345